Each of these graffitis in the sand and on walls has its own message...
Nature can produce very interesting little works of art, and so does man. Feel free to associate whatever you want...
Now this would make a nice symbol for the Windows Desktop Recycling bin. This gas mask shaped bin has been seen on a ferry. Ever cared for garlic? And ever wondered why he's called Pikk Hermann??
Estonians love flowers, Russians love newspapers, and I doubt if anyone loves the ticket validators in the trams, let alone understand how they work :)